This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A326481 #8 Jul 12 2019 20:20:59
%S A326481 1,-2,2,4,-16,-32,272,544,-7936,-15872,353792,707584,-22368256,
%T A326481 -44736512,1903757312,3807514624,-209865342976,-419730685952,
%U A326481 29088885112832,58177770225664,-4951498053124096,-9902996106248192,1015423886506852352
%N A326481 a(n) = E2_{n}(0) with E2_{n} the polynomials defined in A326480.
%C A326481 For comments see A326480.
%p A326481 # The function E2(n) is defined in A326480.
%p A326481 seq(subs(x=0, E2(n)), n=0..22);
%Y A326481 Bisections (up to signs): A000182, A012509.
%Y A326481 Cf. A326480, A155585, A326481, A326482, A326483, A326484.
%Y A326481 Cf. A063376, A241209.
%K A326481 sign
%O A326481 0,2
%A A326481 _Peter Luschny_, Jul 12 2019